Two Boston doctors brought, by their admission, “probably two and a half times as much as we’d need” of baby food on a recent flight from Chicago Midway Airport to Manchester, N.H. The TSA agent told them it was above the official limit and confiscated it. The parents argued that in light of record delays, winter weather, and stranded-on-the-tarmac stories, they wanted to be fully prepared. The TSA officers told them they’d need a doctor’s note to bring that much food on board—but, um, from another doctor who wasn’t one of the parents.